N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 9 - Wireless Systems and Technologies                                                                                 Slide 29 of 80                                                                                                    ________________

Third - Generation (3G) Systems Technologies

                                    CDMA            IS-95 Standard Based 

                                    W-CDMA - GSM

                                    UWC - 136     IS-136 Standard Based

                                    TDMA

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Third-Generation systems use CDMA and TDMA techniques to access the network.

Code Division Multiple Access (CDMA) - A network access standard using spread spectrum transmission, sometimes referred to as IS-95 or cdmaone.

Wideband CDMA (W-CDMA) - Supports approximately 3.68 M bps, three times of CDMA. 

UWC - 136 - is a third-generation wireless standard proposal based on TDMA technology that was developed by the Universal Wireless Communications (UWC) Consortium and is one of the 3G candidates submitted to the International Telecommunication Union by the United States. UWC-136 represents an evolutionary path for both the old analog Advanced Mobile Phone System (AMPS) and the second-generation TIA/EIA-136 technologies.